FRUITS. 



161 



PLATE LXXL 



FIG. 81. Powdered Black Pepper (x 240). 



a, Starch grains. 



ca, Outer layers of perisperm containing aleurone. 



e, Outer epidermis of pericarp. 



flfvi Debris of fibro-vascular bundle. 



fp, Pitted fibrous.cells from bundle. 



go, Oil-cells. 



me, Outer portion of mesocarp. 



mi, Inner portion of mesocarp. 



m'i', The same in longitudinal section. 



mm, Cells from central part of mesocarp. 



per, Cells of perisperm containing starch. 



see, Cells of the outer sclerenchymatous layer. 



sci, Cells of the inner sclerenchymatous layer, in surface view. 



s'c'i', The same in profile. 



tc, The brown layer of seed-coat, in surface view. 



t'c', The same in profile. 



M 



